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Record 1 of 4426
Effect of preload on the fatigue and static strength of composite laminates with defects
Author and Affiliation:
Porter, T. R.(Boeing Aerospace Co., Seattle, Wash., United States)
Smith, G. T.(NASA Lewis Research Center, Cleveland, Ohio, United States)
Abstract: The effect of a preload cycle on the structural performance of three graphite/epoxy composite laminates was studied. The layups studied were a laminate typical of general purpose structures (L1), a laminate representative of a filament wound tank (L2), and a laminate representative of turboengine fan blades. The effects of three sizes of simulated initial defects were studied. The tests developed static strength data, fatigue to failure data, and residual static data after application of a predetermined number of fatigue cycles. For L1 specimens, there was a slight trend for the static strength to be greater for preloaded specimens. After application of cyclic loading, however, the influence of preloading was insignificant. In L2 and L3 specimens there was no consistent difference in the static or fatigue results between preloaded and nonpreloaded specimens.
Publication Date: Jan 01, 1977
Document ID:
19780056401
(Acquired Dec 01, 1995)
Accession Number: 78A40310
Subject Category: COMPOSITE MATERIALS
Document Type: Conference Proceedings
Publication Information: (SEE A78-40301 17-31)
Publisher Information: United States
Meeting Information: Annual Meeting on Recent advances in engineering science; November 14-16, 1977; Bethlehem, PA
Financial Sponsor: NASA; United States
Organization Source: Boeing Aerospace Co.; Seattle, WA, United States
NASA Lewis Research Center; Cleveland, OH, United States
Description: 4p; In English
Distribution Limits: Unclassified; Publicly available; Unlimited
Rights: Copyright
NASA Terms: CYCLIC LOADS; DEFECTS; FATIGUE LIFE; GRAPHITE-EPOXY COMPOSITES; LAMINATES; CRACK PROPAGATION; EPOXY RESINS; FRACTURE STRENGTH; STATIC TESTS; TURBINE BLADES
Imprint And Other Notes: In: Recent advances in engineering science; Proceedings of the Fourteenth Annual Meeting, Bethlehem, Pa., November 14-16, 1977. (A78-40301 17-31) Bethlehem, Pa., Lehigh University, 1977, p. 267-270.
Availability Source: Other Sources
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